I had arranged to meet a colleague at my University Library coffee shop the other day but, arriving too early, I looked around for somewhere to kill 15 minutes. I spotted a doorway marked "Ethnic Minority Accounting Museum". Walking in, I found a collection of darkened rooms. A receptionist suddenly appeared, clearly surprised to receive a visitor, and happily turned on all the lights for me. The exhibition was based around the ways that ethnic groups in China have recorded trade deals and wealth through the ages. It had a pleasing amount of English labelling, one of which claimed to show the "largest metal coin in the world" [see above]. Not easy on the pocket or purse, I suspect! There was surprisingly little Chinglish to amuse me, but one sign did catch my eye [see below].